This creamy spring onion soup has a vibrant green color and a subtle, sweet onion flavor. It comes together in just 25 minutes with only a handful of simple ingredients.
Boil the potatoes in a small pot, adding just enough water to cover them.
In a separate pot, add the butter or olive oil and let it melt and heat over low heat.
Add the chopped spring onions and onion. Stir continuously until all the onions are soft and cooked, being careful not to burn them. This will take up to 10-15 minutes.
If they start to stick, add a little water.
When the potatoes are boiled, add them to the pot with the onions, along with their cooking water.
Stir and season with salt, white pepper and ground coriander.
Remove from the heat.
Using an immersion blender, blend all the vegetables until the soup reaches a creamy consistency.
If needed, add more water to reach the desired consistency.
Serve topped with fresh thyme and a drizzle of olive oil.
Notes
Save the starchy potato water — it goes into the soup and is part of what makes it creamy. For a vegan version, swap the butter for 2-3 tablespoons of olive oil.